ST. LOUIS -- The Cardinals will have an opportunity to fortify their club when rosters expand in two weeks, and manager Mike Matheny suggested on Saturday that the club's class of September callups will probably be larger than the others from his managerial tenure.

Last season, the Cardinals added eight players from the Minors in addition to the three who came off the disabled list. In 2012, the roster expanded by six.

"Most of it is about what can come here and help us because we plan on making a strong run down to the end," Matheny said. "It's going to take everything we've got."

The Cardinals will do most of their plucking from a Triple-A Redbirds team that is making a push for the Pacific Coast League postseason behind a recently hot offense. Four of those players -- Randal Grichuk, Greg Garcia, Audry Perez and Pete Kozma -- are already on the Cardinals' 40-man roster and could be easy September adds.

Xavier Scruggs and Stephen Piscotty would be other callup candidates, though the Cardinals would have to commit a 40-man roster spot to make either move.

"They've had a big offensive season," Matheny said of the Triple-A club. "We've taken some of their hottest hitters and brought them up here and tried to plug them straight in and it didn't necessarily translate. But really happy with the seasons that a lot of those guys are having."

On the pitching end, the Cardinals will stack their bullpen with fresh arms. Carlos Martinez is a lock to rejoin the team. Tyler Lyons, Marco Gonzales, Eric Fornataro and Jorge Rondon are expected to get serious consideration as well.